Question

four bells ring at intervals of 8,12,18,20 minutes respectively at what time will they ring together if they start ringing at Simutenously at 12 noon​

Answer 1

Firstly, take the LCM of bells interval =

LCM ( 8, 12, 18, and 20 ) = 360.

so, after 360 minutes bells will ring together.

We know that,

60 minutes = 1 hour

therefore,

360 minutes = 360/60 = 6 hours

After 6 hours means 10 am + 6hours = 4pm

so, bells will ring together at 4 pm.

Hope it will help u !!

Answer 2

the bells ring at intervals of 8,12,18,20 minutes.

so tofind their time of ringing together we have to find their L.C.M.

8=2×2×2

12=2×2×3

18=2×3×3

20=2×2×5

L.C.M.=360

so,all bells will ring together after 360 minutes .

360 minutes =6 hours

so the bells will ring together after 6 hours from 12 noon.

they will ring together at 6 in the evening.